Quentin Monnet says:
====================
This series adds an option to bpftool to make it print additional
information via libbpf and the kernel verifier when attempting to load
programs.
A new API function is added to libbpf in order to pass the log_level
from bpftool with the bpf_object__* part of the API.
Options for a finer control over the log levels to use for libbpf and
the verifier could be added in the future, if desired.
v3:
- Fix and clarify commit logs.
v2:
- Do not add distinct options for libbpf and verifier logs, just keep the
one that sets all log levels to their maximum. Rename the option.
- Do not offer a way to pick desired log levels. The choice is "use the
option to print all logs" or "stick with the defaults".
- Do not export BPF_LOG_* flags to user header.
- Update all man pages (most bpftool operations use libbpf and may print
libbpf logs). Verifier logs are only used when attempting to load
programs for now, so bpftool-prog.rst and bpftool.rst remain the only
pages updated in that regard.
Previous discussion available at:
https://lore.kernel.org/bpf/20190523105426.3938-1-quentin.monnet@netronome.com/https://lore.kernel.org/bpf/20190429095227.9745-1-quentin.monnet@netronome.com/
====================
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
The "-d" option is used to require all logs available for bpftool. So
far it meant telling libbpf to print even debug-level information. But
there is another source of info that can be made more verbose: when we
attemt to load programs with bpftool, we can pass a log_level parameter
to the verifier in order to control the amount of information that is
printed to the console.
Reuse the "-d" option to print all information the verifier can tell. At
this time, this means logs related to BPF_LOG_LEVEL1, BPF_LOG_LEVEL2 and
BPF_LOG_STATS. As mentioned in the discussion on the first version of
this set, these macros are internal to the kernel
(include/linux/bpf_verifier.h) and are not meant to be part of the
stable user API, therefore we simply use the related constants to print
whatever we can at this time, without trying to tell users what is
log_level1 or what is statistics.
Verifier logs are only used when loading programs for now (In the
future: for loading BTF objects with bpftool? Although libbpf does not
currently offer to print verifier info at debug level if no error
occurred when loading BTF objects), so bpftool.rst and bpftool-prog.rst
are the only man pages to get the update.
v3:
- Add details on log level and BTF loading at the end of commit log.
v2:
- Remove the possibility to select the log levels to use (v1 offered a
combination of "log_level1", "log_level2" and "stats").
- The macros from kernel header bpf_verifier.h are not used (and
therefore not moved to UAPI header).
- In v1 this was a distinct option, but is now merged in the only "-d"
switch to activate libbpf and verifier debug-level logs all at the
same time.
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
libbpf was recently made aware of the log_level attribute for programs,
used to specify the level of information expected to be dumped by the
verifier. Function bpf_prog_load_xattr() got support for this log_level
parameter.
But some applications using libbpf rely on another function to load
programs, bpf_object__load(), which does accept any parameter for log
level. Create an API function based on bpf_object__load(), but accepting
an "attr" object as a parameter. Then add a log_level field to that
object, so that applications calling the new bpf_object__load_xattr()
can pick the desired log level.
v3:
- Rewrite commit log.
v2:
- We are in a new cycle, bump libbpf extraversion number.
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
libbpf has three levels of priority for output messages: warn, info,
debug. By default, debug output is not printed to the console.
Add a new "--debug" (short name: "-d") option to bpftool to print libbpf
logs for all three levels.
Internally, we simply use the function provided by libbpf to replace the
default printing function by one that prints logs regardless of their
level.
v2:
- Remove the possibility to select the log-levels to use (v1 offered a
combination of "warn", "info" and "debug").
- Rename option and offer a short name: -d|--debug.
- Add option description to all bpftool manual pages (instead of
bpftool-prog.rst only), as all commands use libbpf.
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Fix below warning reported by coccicheck:
/tools/lib/bpf/libbpf.c:3461:1-3: WARNING: PTR_ERR_OR_ZERO can be used
Signed-off-by: Hariprasad Kelam <hariprasad.kelam@gmail.com>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Commit 8b401f9ed2 ("bpf: implement bpf_send_signal() helper")
introduced bpf_send_signal() helper. If the context is nmi,
the sending signal work needs to be deferred to irq_work.
If the signal is invalid, the error will appear in irq_work
and it won't be propagated to user.
This patch did an early check in the helper itself to notify
user invalid signal, as suggested by Daniel.
Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Auto-complete BTF IDs for `btf dump id` sub-command. List of possible BTF
IDs is scavenged from loaded BPF programs that have associated BTFs, as
there is currently no API in libbpf to fetch list of all BTFs in the
system.
Suggested-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
The 'default (active high)' lines are repeated twice. Avoid people stare at
their screens looking for differences.
Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Use standard functions. Eventually we will be able to drop all
checks and just assign irq_domain_translate_twocell() to this
callback.
Cc: Brian Masney <masneyb@onstation.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This feature is deprecated, it is helpful to inform users about
this. I'm resisting the temptation to add "depends on BROKEN"
to this, but saving that for later.
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Since xattr entry names are sorted, we don't have
to continue when current entry name is greater than
target.
Signed-off-by: Chengguang Xu <cgxu519@zoho.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>
Introduce new helper ext2_xattr_cmp_entry() for xattr
entry comparison.
Signed-off-by: Chengguang Xu <cgxu519@zoho.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>
We have introduced ext2_xattr_entry_valid() for xattr
entry sanity check, so it's better to do relevant things
in one place.
Signed-off-by: Chengguang Xu <cgxu519@zoho.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>
While cleaning the ISR of the meson-gx and acking only raised irqs,
the ack of the irq was moved at the very last stage of the function.
This was stable during the initial tests but it triggered issues with
hs200, under specific loads (like booting android). Acking the irqs
after calling the mmc_request_done() causes the problem.
Moving the ack back to the original place solves the issue. Since the
irq is edge triggered, it does not hurt to ack irq even earlier, so
let's do it early in the ISR.
Fixes: 9c5fdb07a2 ("mmc: meson-gx: ack only raised irq")
Tested-by: Neil Armstrong <narmstrong@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Brad Harper <bjharper@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
If an SCC error occurs during a read/write command execution, a false
positive CRC error message is output.
mmcblk0: response CRC error sending r/w cmd command, card status 0x900
check_scc_error() checks SCC_RVSREQ.RVSERR bit. RVSERR detects a
correction error in the next (up or down) delay tap position. However,
since the command is successful, only retuning needs to be executed.
This has been confirmed by HW engineers.
Thus, on SCC error, set retuning flag instead of setting an error code.
Fixes: b85fb0a1c8 ("mmc: tmio: Fix SCC error detection")
Signed-off-by: Takeshi Saito <takeshi.saito.xv@renesas.com>
[wsa: updated comment and commit message, removed some braces]
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
The code to prepare the static identity map for various reserved
memory ranges in intel_iommu_init() is duplicated with the default
domain mechanism now. Remove it to avoid duplication.
Signed-off-by: James Sewart <jamessewart@arista.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
The iommu generic code has handled the device hotplug cases.
Remove the duplicated code.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Previously, get_valid_domain_for_dev() is used to retrieve the
DMA domain which has been attached to the device or allocate one
if no domain has been attached yet. As we have delegated the DMA
domain management to upper layer, this function is used purely to
allocate a private DMA domain if the default domain doesn't work
for ths device. Cleanup the code for readability.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
As a domain is now attached to a device earlier, we should
implement the is_attach_deferred call-back and use it to
defer the domain attach from iommu driver init to device
driver init when iommu is pre-enabled in kdump kernel.
Suggested-by: Tom Murphy <tmurphy@arista.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Some platforms may support ACPI name-space enumerated devices
that are capable of generating DMA requests. Platforms which
support DMA remapping explicitly declares any such DMA-capable
ACPI name-space devices in the platform through ACPI Name-space
Device Declaration (ANDD) structure and enumerate them through
the Device Scope of the appropriate remapping hardware unit.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
The iommu driver doesn't know whether the bit width of a PCI
device is sufficient for access to the whole system memory.
Hence, the driver checks this when the driver calls into the
dma APIs. If a device is using an identity domain, but the
bit width is less than the system requirement, we need to use
a dma domain instead. This also applies after we delegated
the domain life cycle management to the upper layer.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
When we put a device into an iommu group, the group's default
domain will be attached to the device. There are some corner
cases where the type (identity or dma) of the default domain
doesn't work for the device and the request of a new default
domain results in failure (e.x. multiple devices have already
existed in the group). In order to be compatible with the past,
we used a private domain. Mark the private domains and disallow
some iommu apis (map/unmap/iova_to_phys) on them.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This allows the iommu generic layer to allocate a dma domain and
attach it to a device through the iommu api's. With all types of
domains being delegated to upper layer, we can remove an internal
flag which was used to distinguish domains mananged internally or
externally.
Signed-off-by: James Sewart <jamessewart@arista.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This allows the iommu generic layer to allocate an identity domain
and attach it to a device. Hence, the identity domain is delegated
to upper layer. As a side effect, iommu_identity_mapping can't be
used to check the existence of identity domains any more.
Signed-off-by: James Sewart <jamessewart@arista.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This helper returns the default domain type that the device
requires.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
The rmrr devices require identity map of the rmrr regions before
enabling DMA remapping. Otherwise, there will be a window during
which DMA from/to the rmrr regions will be blocked. In order to
alleviate this, we move enabling DMA remapping after all rmrr
regions get mapped.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
To support mapping ISA region via iommu_group_create_direct_mappings,
make sure its exposed by iommu_get_resv_regions.
Signed-off-by: James Sewart <jamessewart@arista.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Get the HDR dependencies originally merged via drm-misc. Sync up all
i915 changes applied via other trees. And get v5.2-rc2 as the baseline.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
The WARN_ON() macro takes a condition, not a warning message. I've
changed this to use WARN(1, "msg...
Fixes: ea8fc5953e ("mmc: tegra: update hw tuning process")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
We accidentally changed the error code from -EAGAIN to 1 when we did the
blk-mq conversion.
Maybe a contributing factor to this mistake is that it wasn't obvious
that the "while (chunk) {" condition is always true. I have cleaned
that up as well.
Fixes: d0be12274d ("mspro_block: convert to blk-mq")
Cc: stable@vger.kernel.org
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Calling bdi_rw_congested() instead of calling
bdi_read_congested() and bdi_write_congested().
Signed-off-by: Chengguang Xu <cgxu519@zoho.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>
ifmsh->csa is an RCU-protected pointer. The writer context
in ieee80211_mesh_finish_csa() is already mutually
exclusive with wdev->sdata.mtx, but the RCU checker did
not know this. Use rcu_dereference_protected() to avoid a
warning.
fixes the following warning:
[ 12.519089] =============================
[ 12.520042] WARNING: suspicious RCU usage
[ 12.520652] 5.1.0-rc7-wt+ #16 Tainted: G W
[ 12.521409] -----------------------------
[ 12.521972] net/mac80211/mesh.c:1223 suspicious rcu_dereference_check() usage!
[ 12.522928] other info that might help us debug this:
[ 12.523984] rcu_scheduler_active = 2, debug_locks = 1
[ 12.524855] 5 locks held by kworker/u8:2/152:
[ 12.525438] #0: 00000000057be08c ((wq_completion)phy0){+.+.}, at: process_one_work+0x1a2/0x620
[ 12.526607] #1: 0000000059c6b07a ((work_completion)(&sdata->csa_finalize_work)){+.+.}, at: process_one_work+0x1a2/0x620
[ 12.528001] #2: 00000000f184ba7d (&wdev->mtx){+.+.}, at: ieee80211_csa_finalize_work+0x2f/0x90
[ 12.529116] #3: 00000000831a1f54 (&local->mtx){+.+.}, at: ieee80211_csa_finalize_work+0x47/0x90
[ 12.530233] #4: 00000000fd06f988 (&local->chanctx_mtx){+.+.}, at: ieee80211_csa_finalize_work+0x51/0x90
Signed-off-by: Thomas Pedersen <thomas@eero.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
When dumping stations, memory allocated for station_info's
pertid member will leak if the nl80211 header cannot be added to
the sk_buff due to insufficient tail room.
I noticed this leak in the kmalloc-2048 cache.
Cc: stable@vger.kernel.org
Fixes: 8689c051a2 ("cfg80211: dynamically allocate per-tid stats for station info")
Signed-off-by: Andy Strohman <andy@uplevelsystems.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
